Support Hard Drive S.M.A.R.T Attributes

Below is the table of Hard Drive S.M.A.R.T attributes that supported by Hard Drive Monitor.

Please note, not all hard drives support S.M.A.R.T features. The S.M.A.R.T. can be controlled in the BIOS of most computers. It may or may not be enabled on your computer, for most current hard drives, this entry should be set to "Enabled".

ID

Hex

Attribute name

Better

Description

01

01

Read Error Rate

Lower

Indicates the rate of hardwareread errors that occurred when reading data from a disk surface. Any number indicates a problem with either disk surface or read/write heads.

02

02

Throughput Performance

Higher

Overall (general) throughputperformance of a hard disk drive. If the value ofthis attribute is decreasing there is a high probability that there is aproblem with the disk.

03

03

Spin-Up Time

Lower

Average time of spindle spin up (from zero RPM to fully operational).

04

04

Start/Stop Count

A tally of spindle start/stopcycles.

05

05

Reallocated Sectors Count

Lower

Count of reallocated sectors. When the hard drive finds a read/write/verificationerror, it marks this sector as "reallocated" and transfers data to a special reserved area (spare area). This process is also known as remappingand "reallocated" sectors are called remaps. This is why, on modern hard disks, "bad blocks" cannot be found while testing thesurface — all bad blocks are hidden in reallocated sectors. However, the more sectors that are reallocated,the more read/write speed will decrease.

06

06

Read Channel Margin

Margin of a channel while reading data. The function of this attribute is not specified.

07

07

Seek Error Rate

Lower

Rate of seek errors of the magnetic heads. If there is a failure in the mechanical positioning system, a servo damage or a thermal widening of the hard disk, seek errors arise. More seek errors indicates a worsening condition of a disk surface and the mechanical subsystem.

08

08

Seek Time Performance

Higher

Average performance of seek operations of the magnetic heads. If thisattribute is decreasing, it is a sign of problems in themechanical subsystem.

09

09

Power-On Hours (POH)

Lower

Count of hours in power-on state. The raw value of this attribute shows total count of hours (or minutes, or seconds, depending on manufacturer) in power-on state.

10

0A

Spin Retry Count

Lower

Count of retry of spin startattempts. This attribute stores a total count of the spin start attempts to reach the fully operational speed under the condition that the first attempt was unsuccessful). An increase of this attribute value is a sign of problems in the hard disk mechanical subsystem.

11

0B

Recalibration Retries

Higher

This attribute indicates the number of times recalibration was requested (under the condition that the first attempt wasunsuccessful). A decrease of this attribute value is a sign of problems in the hard disk mechanical subsystem.

12

0C

Device Power Cycle Count

This attribute indicates the count of full hard disk power on/off cycles.

13

0D

Soft Read Error Rate

Lower

Uncorrected read errors reported to the operating system. If the value is non-zero, you should back up your data.

190

BE

Airflow Temperature (WDC)

Lower

Airflow temperature on WesternDigital HDs (Same as temp. (C2), but current value is 50 less.)

Number of times the heads are loaded off the media. Heads can be unloaded without actually powering off. (or Emergency Retract Cyclecount -Fujitsu)

193

C1

Load/Unload Cycle

Count of load/unload cycles into head landing zone position.

194

C2

Temperature

Lower

Current internal temperature.

195

C3

Hardware ECC Recovered

Higher

Time between ECC-corrected errors.

196

C4

Reallocation Event Count

Lower

Count of remap operations. The raw value of this attribute shows the total number of attempts to transfer data from reallocatedsectors to a spare area. Both successful & unsuccessful attempts are counted.

197

C5

Current Pending Sector Count

Lower

Number of "unstable" sectors (waiting to be remapped). If the unstable sector is subsequently
written or read successfully, this value is decreased and the sector is not remapped. Read errors on the sector
will not remap the sector, it will only be remapped on a failed write attempt. This can be problematic to test
because cached writes will not remap the sector, only direct I/O writes to the disk.

198

C6

Uncorrectable Sector Count

Lower

The total number of uncorrectable errors when
reading/writing a sector. A rise in the value of this
attribute indicates defects of the disk surface and/or
problems in the mechanical subsystem.

199

C7

UltraDMA CRC Error Count

Lower

The number of errors in data transfer via the interface
cable as determined by ICRC (Interface Cyclic
Redundancy Check).

200

C8

Write Error Rate / Multi-Zone Error Rate

Lower

The total number of errors when writing a sector.

201

C9

Soft Read Error Rate

Lower

Number of off-track errors. If non-zero, make a backup.

252

CA

Data Address Mark errors

Lower

Number of Data Address Mark errors (or vendorspecific).

203

CB

Run Out Cancel

Lower

Number of ECC errors

204

CC

Soft ECC Correction

Lower

Number of errors corrected by software ECC

205

CD

Thermal Asperity Rate (TAR)

Lower

Number of thermal asperity errors.

206

CE

Flying Height

207

CF

Spin High Current

Amount of high current used to spin up the drive.

208

D0

Spin Buzz

Number of buzz routines to spin up the drive

209

D1

Offline Seek Performance

Drive’s seek performance during offline operations

220

DC

Disk Shift

Lower

Distance the disk has shifted relative to the spindle (usually due to shock). Unit of measure is unknown.

221

DD

G-Sense Error Rate

Lower

The number of errors resulting from externally-induced
shock & vibration.

222

DE

Loaded Hours

Time spent operating under data load (movement of
magnetic head armature)

223

DF

Load/Unload Retry Count

Number of times head changes position.

224

E0

Load Friction

Lower

Resistance caused by friction in mechanical parts while
operating.

225

E1

Load/Unload Cycle Count

Lower

Total number of load cycles

226

E2

Load 'In'-time

Total time of loading on the magnetic heads actuator
(time not spent in parking area).

227

E3

Torque Amplification Count

Lower

Number of attempts to compensate for platter speed
variations

228

E4

Power-Off Retract Cycle

Lower

The number of times the magnetic armature was
retracted automatically as a result of cutting power.

230

E6

GMR Head Amplitude

Amplitude of "thrashing" (distance of repetitive
forward/reverse head motion)